So, I started poking about, and directly fetched the stylesheet responsible for the ERR_TOO_MANY_REDIRECTS (https://static.bridgebaseonline.com/v3/styles.154a248436f1ea18f388.css). This worked, and now the site works again too. This seems odd to me - I'd have thought that your suggestion to clear the cache would have had a similar effect. In any case, it's working now... - Dave